1003-98-1Relevant articles and documents
Synthesis of 6-carboxylated phenanthridines by oxidative alkoxycarbonylation-cyclization of 2-isocyanobiphenyls with carbazates
Wang, Gao,Chen, Shan-Yong,Yu, Xiao-Qi
, p. 5338 - 5341 (2014)
An iron-catalyzed synthesis of 6-carboxylated phenanthridines starting with readily prepared isocyanides and carbazates was developed. Reactions occurred via addition of alkoxycarbonyl radicals to the isocyanide group and subsequent intramolecular cyclization.
Mild and regioselective oxidative bromination of anilines using potassium bromide and sodium perborate
Roche, Didier,Prasad, Kapa,Repic, Oljan,Blacklock, Thomas J.
, p. 2083 - 2085 (2000)
The selective monobromination of various deactivated anilines using potassium bromide and sodium perborate as oxidant has been achieved. The use of ammonium molybdate as catalyst accelerates the rate of reaction but is not essential to obtain good yields and high selectivities. (C) 2000 Elsevier Science Ltd.
4 - Fluorine substituted aryl amine compound and synthesis method thereof
-
Paragraph 0063-0065, (2021/09/22)
The invention discloses a synthesis method of 4 -fluorine substituted aryl amine compound, which comprises the following steps: 1) taking acyl-protected phenylhydroxylamine as a substrate, and generating 4 -fluorine substituted aniline compound under basic conditions by taking sulfonyl fluoride as a fluorine source in a polar solvent. 2) The deprotection is carried out under dilute acid conditions or Pd by catalytic hydrogenation to give the 4 - fluorine-substituted aryl amine compound. 4 - Fluorine substituted aniline compounds which are synthesized by the invention greatly increase the lipophilic property due to the introduction of fluorine atoms, and can be widely applied to preparation of fluorine-containing drugs and pesticide and dye intermediates. , The adopted raw materials are industrial products, are cheap and easily available, and are commercially available. 4 - Fluoroaryl aniline prepared by the method is high in yield, and the product with the purity 90% can be obtained in a yield of more than ≥ 99%. The method is simple to operate and low in cost, is very suitable for industrialization, and can be widely popularized and used.
Nitromethane as a reagent for the synthesis of 3-nitroindoles from 2-haloarylamine derivatives
Chesnokov,Ageshina,Maryanova,Rzhevskiy,Gribanov,Topchiy,Nechaev,Asachenko
, p. 2370 - 2377 (2020/12/31)
A new approach to the synthesis of 3-nitroindoles using palladium-catalyzed arylation of nitromethane with N-(2-bromoaryl)imidates was developed. A convenient and rapid method for cyclization of ethyl N-(2-nitromethylaryl)acetimidates to 2-methyl-3-nitro-1H-indoles was proposed.